title: Further observations on serum free thyroxine concentrations during pregnancy.
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy; D011933:Reagent Kits, Diagnostic; D013974:Thyroxine / Q000097:blood*; D013997:Time Factors
chemical_list: D011933:Reagent Kits, Diagnostic; D013974:Thyroxine